Former piece of Pacific Ocean floor imaged deep beneath China

Source: Science Daily

In a study that gives new meaning to the term ‘rock bottom,’ seismic researchers have discovered the underside of a rocky slab of Earth’s lithosphere that has been pulled more than 400 miles beneath northeastern China by the process of tectonic subduction.

https://www.sciencedaily.com/releases/2020/11/201116075717.htm